Replace the SetPEFlags code

Remove the outdated license text.
Use the main cef.inc file in all Delphi demos.
Fixed issue #493.

demos/Delphi_VCL/JavaScript/JSSimpleExtension/uJSSimpleExtension.dfm

@@ -10,12 +10,10 @@ object JSSimpleExtensionFrm: TJSSimpleExtensionFrm
   Font.Height = -11
   Font.Name = 'Tahoma'
   Font.Style = []
-  OldCreateOrder = False
   Position = poScreenCenter
   OnCloseQuery = FormCloseQuery
   OnCreate = FormCreate
   OnShow = FormShow
-  PixelsPerInch = 96
   TextHeight = 13
   object NavControlPnl: TPanel
     Left = 0